/Engine/Source/Runtime/VulkanRHI/Public/VulkanDynamicRHI.h
static [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IHeadMountedDisplayVulkanExtensions](API\Runtime\HeadMountedDisplay\IHeadMountedDisplayVulkanExtensi-), ESPMode::ThreadSafe > HMDVulkanExtensions;